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Finding the Fourth Proportional to 142,245.60, 213,368.40 and 72,261.60

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Solution

The fourth proportional to 142,245.60, 213,368.40 and 72,261.60 is: 108,392.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,245.60 : 213,368.40 = 72,261.60 : x
  2. Step 2: Convert to fraction form
    142,245.60/213,368.40 = 72,261.60/x
  3. Step 3: Cross multiply
    142,245.60x = 213,368.40 × 72,261.60
  4. Step 4: Simplify right side
    142,245.60x = 15,418,341,973.44
  5. Step 5: Solve for x
    x = 15,418,341,973.44/142,245.60
  6. Step 6: Final answer
    x = 108,392.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.